M 5.5 earthquake: Philippine Sea (Surigao, Philippines) — May 9, 1991

M 5.5 earthquake: Philippine Sea (Surigao, Philippines) — May 9, 1991. Epicenter 66 km N of Surigao, depth 26 km, 02:00 Local (1991-05-08 18:00 UTC). Shaking felt by ~8.7M people. Readings from every reporting agency, affected towns, aftershock sequence.

Philippine Sea (66 km N of Surigao, Philippines) — 10.352, 125.325

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